WATERS CORPORATION TQ, Operator'S Manual, Page: 116 / 192

4 Maintenance Procedures
116 December 6, 2012, 71500126802IVD Rev. C
Replacing the ion block source heater
Replace the ion block source heater if it fails to heat when the instrument is
pumped down (evacuated).
Required materials:
• Chemical-resistant, powder-free gloves
• Needle-nose pliers
• 1.5-mm and 2.5-mm Allen wrenches
To replace the ion block source heater
1. Remove the ion block assembly from the instrument (see page 84 ).
2. Ensure that the isolation valve is closed.
Warning:
The capillary and ferrule can be contaminated
with biohazardous and/or toxic materials. Ensure that they
are correctly disposed of according to local environmental
regulations.
Warning:
The ion block assembly can be contaminated with
biohazardous and/or toxic materials. Always wear
chemical-resistant, powder-free gloves while performing this
procedure.
TP02650
Isolation valve handle
in closed position